IWC
Da Vinci IW3728-10— lug 19mm

The IW3728-10 features a lug width of 19 millimetres, measured precisely between the lugs at the point where the strap attaches to the case. This dimension is specific to the model and must be respected strictly: an undersized strap (18 mm) creates visible play, whilst an oversized one (20 mm) forces insertion and risks case damage. Precision in lug-to-strap matching is critical for both aesthetics and case longevity.

The IW3728-10 pairs exceptionally well with leather straps, with a clear preference for alligator and shell cordovan in natural or dark tones. Fine-grained alligator in chocolate brown or black accentuates the chronograph's classical character, whilst burgundy cordovan delivers extraordinary durability and a patina that improves with age. For a contemporary approach, grey talpa calf modernises the aesthetic, while navy blue rubber offers a functional solution for nautical activities or humid environments.

Strap replacement on the IW3728-10 involves removing the spring bars (elastic pins) that secure the strap within the case lugs. Using a dedicated spring bar tool, press one bar inward, extract the old strap, then repeat on the opposite side. The operation requires care to avoid scratching the case. If you lack experience, entrust the task to an authorised service centre or to the Casati Milano atelier, which provides this service during consultations.

Yes, absolutely. Any strap manufactured with a 19 mm lug width is compatible with the IW3728-10. Our milanostraps.it catalogue includes alligator, cordovan, calf and rubber straps, all with 19 mm lugs, available for immediate dispatch or customisable according to your colour preferences. The Casati Milano atelier creates bespoke custom straps with personal leather selection and an 18-month warranty.

Leather strap longevity depends on material and usage patterns. A vegetable-tanned alligator strap typically endures 3–4 years under normal daily conditions before showing wear at the spring bars. Shell cordovan, prized for its extraordinary fibrous structure, exceeds 5–7 years even under intensive use. Standard calf leather averages 2–3 years. All milanostraps.it straps carry a warranty against manufacturing defects; Casati Milano provides an 18-month warranty on bespoke custom straps.